This is the mandatory rule for Chez Scheme which was only broken once when their entire backend was rewritten, and also (from what I have heard) a large guiding

This is the mandatory rule for Chez Scheme which was only broken once when their entire backend was rewritten, and also (from what I have heard) a large guiding principle for the C# compiler at Microsoft. It's extreme but it's a good idea because it treats compilation time like an actual budget, which it is. You can't just add things endlessly. But it's not easy to achieve in practice.